Nationals outfielder Jose Guillen hit a solo home run in the top of the first inning of Saturday's 4-2 victory over the Chicago Cubs, increasing his major league-leading total of homers on the road. But the disparity in his numbers -- 16 road homers, just one at RFK Stadium -- is getting ridiculous.

"That ballpark, it's not a normal ballpark," Guillen said. "A lot of hitters have been going there, and it's been driving people crazy."

Guillen now has six homers in his last five road games. His only homer at RFK came April 29 against the New York Mets.

Getting Healthy

Team physician Bruce Thomas said shortstop Cristian Guzman, out because of a strained hamstring, and first baseman Nick Johnson, out because of a bruised heel, were much improved Saturday. Guzman comfortably rode a stationary bike, yet he still won't play in the series finale Sunday.

Johnson said he felt better, and he might take some swings Sunday for the first time since injuring the heel June 26 against Toronto. Both players could play in the upcoming home series against the Mets. . . .

The Nationals have discussed trying to trade for Cincinnati's Eric Milton, who is 3-9 with a 7.40 ERA. Milton has given up a major league high 27 homers. But there is some thought that Milton would benefit from RFK, which has allowed just 1.13 homers per game, fewest in baseball. Cincinnati's Great American Ball Park has yielded the most, 3.02.